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maksim [4K]
3 years ago
5

Jennifer earns $7.60 per hour working after school. She wants to buy a musical instrument and she needs at least $500. Write an

inequality that describes how many hours she must work to buy the instrument.
Mathematics
1 answer:
slega [8]3 years ago
6 0

Answer:

Step-by-step explanation:

let h be the number of hours.

7.60 h≥ 500

76h≥5000

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Find the sum of the following ap .1) 1/15, 1/12, 1/10,....,to 11 terms​
sertanlavr [38]

Answer:

33/20

Step-by-step explanation:

1/12 - 1/15 = 5/60 - 4/60 = 1/60

d = 1/60

a_n = a_1 + d(n - 1)

a_11 = 1/15 + (1/60)(11 - 1)

a_11 = 1/15 + 1/6

a_11 = 4/60 + 10/60

a_11 = 14/60

a_11 = 7/30

a_12 = 14/60 + 1/60

a_12 = 15/60

a_12 = 1/4

s_n = n(a_1 + a_n)/2

s_11 = 11(1/15 + 7/30)/2

s_11 = 11(2/30 + 7/30)/2

s_11 = 11(9/30)/2

s_11 = 99/60

s_11 = 33/20

8 0
3 years ago
A tire shop had to fill 2 1/2 tires with air. It took a small air compressor five minutes to fill them up. How long did it take
PSYCHO15rus [73]

Answer:

It took 2.5 (2 and a half) minutes to fill up one tire

Step-by-step explanation:

Hope this helps :)

8 0
3 years ago
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Find the area of this circle.<br> Use 3.14 to approximate<br> A = ar2<br> 20 ft
trasher [3.6K]

Answer:

314

Step-by-step explanation:

6 0
2 years ago
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2 people have calculators, one person starts at 100 and subtracts 7 each time. Another starts at zero and adds 3 each time. If t
zaharov [31]

Answer:

  Yes, after 10 key presses, both will arrive at the number 30.

Step-by-step explanation:

The difference between the numbers on the calculators is reduced by 10 with each key press. After 10 key presses, the initial difference of 100 will be zero. After 10 key presses of (-7), the calculator starting at 100 will be ...

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After 10 key presses of (+3), the calculator starting at 0 will be ...

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Both calculators will show 30 after 10 key presses.

3 0
3 years ago
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liubo4ka [24]

Sides of first rectangle are 12 inches and 6 inches

and sides of second rectangle are 10 inches and 5 inches

So to find the ration of sides we can do

Ratio of bases = 12/10 = 6/5

Ratio of altitudes = 6/5

Area of first rectangle = base * altitude = 12 *6 = 72 square inches

6 0
3 years ago
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